Excited baryon decay widths in large Nc QCD

Thomas D. Cohen, Daniel C. Dakin, Abhinav Nellore, Richard Lebed

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

We study excited baryon decay widths in large Nc QCD. It was suggested previously that some spin-flavor mixed-symmetric baryon states have strong couplings of O(Nc -1/2) to nucleons [implying narrow widths of O(1/Nc)], as opposed to the generic expectation based on Witten's counting rules of an O(Nc 0) coupling. The calculation obtaining these narrow widths was performed in the context of a simple quark-shell model. This paper addresses the question of whether the existence of such narrow states is a general property of large Nc QCD. We show that a general large Nc QCD analysis does not predict such narrow states; rather they are a consequence of the extreme simplicity of the quark model.

Original languageEnglish (US)
Article number056001
JournalPhysical Review D
Volume69
Issue number5
DOIs
StatePublished - 2004

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baryons
quantum chromodynamics
decay
quark models
nucleons
counting
quarks

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Excited baryon decay widths in large Nc QCD. / Cohen, Thomas D.; Dakin, Daniel C.; Nellore, Abhinav; Lebed, Richard.

In: Physical Review D, Vol. 69, No. 5, 056001, 2004.

Research output: Contribution to journalArticle

Cohen, Thomas D. ; Dakin, Daniel C. ; Nellore, Abhinav ; Lebed, Richard. / Excited baryon decay widths in large Nc QCD. In: Physical Review D. 2004 ; Vol. 69, No. 5.
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